A fidget spinner app is now the top free app in the App Store

Forget real-life fidget spinners: An app that simulates a fidget spinner is now the top free app in the App Store.

Called "$4," the app is a gamified version of the $4 toy. The app works by giving you five swipes to get the longest spin you can, and the goal is to unlock rewards and new spinners.

Finger Spinner is made by Ketchapp Games, the company behind "2048" and $4

The app has now overtaken top apps like YouTube, Messenger, Instagram, and Snapchat on the $4.

Fidget spinner apps are only popular with iPhone users, apparently. The Android version of the app - called $4 - isn't among the top $4, although an app called $4 clocks in at No. 21.